Two-component scalar and fermionic dark matter candidates in a generic U$(1)_X$ model

Das, Arindam; Gola, Shivam; Mandal, Sanjoy; Sinha, Nita

doi:10.48550/arxiv.2202.01443

Cited by 2 publications

(2 citation statements)

References 61 publications

(97 reference statements)

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“…The LEP and the future e+e-collider bounds were obtained using contact interaction strategy in the Refs. [120,121]. Right Panel: Current experimental constraints in the m Z BL vs g BL parameter space corresponding to B-L vector boson (as shown in left panel of Fig.…”

Section: Model Constraints From Lhcmentioning

confidence: 99%

Radiative Plateau Inflation with Conformal Invariance: Dynamical Generation of Electroweak and Seesaw Scales

Ghoshal¹,

Okada²,

Paul³

2022

Preprint

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We investigate in scale-invariant B −L scenario where the Standard Model (SM) is supplemented with a dark scalar φ associated with gauge & Yukawa interactions, described by the couplings g BL and y respectively, leading to radiative plateau inflation at scale φ = M in the ultraviolet (UV), while dynamically generating the Electroweak and Seesaw scales á lá Coleman-Weinberg in the infrared (IR). This is particularly achieved implementing threshold correction at an energy scale µ T arising due to the presence of vector-like fermions. We show that implementing the inflationary observables makes the couplings solely dependent on the plateau scale or inflection-point scale M , leaving us with only two independent parameters M and µ T . Within the theoretically consistent parameter space regions defined by m Z BL > 850 GeV, from the assumption of independent evolution of the dark sector couplings from the SM couplings and M < 5.67 times the Planck scale (M P ) required for the realisation of inflationary plateau-like behaviour of the potential around φ = M , we identify the parameter space that is excluded by current LHC results involving searches for the heavy Z BL boson. For typical benchmark points in the viable parameter regions, we estimate the reheating temperature to be ∼ O(T eV ) thus consistent with the standard Big Bang Nucleosynthesis (BBN) constraints. For typical benchmark points (M = 5.67, 1, 0.1 M P ) we predict the scales of inflation to be H inf

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Section: Model Constraints From Lhcmentioning

confidence: 99%

Radiative Plateau Inflation with Conformal Invariance: Dynamical Generation of Electroweak and Seesaw Scales

Ghoshal¹,

Okada²,

Paul³

2022

Preprint

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show abstract

“…The allowed benchmark value of g is taken from [83] satisfying LHC dilepton, dijet and LEP-II constraints. We consider three benchmarks of sin α = 0.1, 0.05 and 0.025 respectively which is taken from [100] which are allowed benchmark points after the application of LEP and LHC limits. In this case we consider x H = 0 which is the B−L case.…”

Section: Heavy Neutrino Pair Production From Bsm Scalar At E − E + Co...mentioning

confidence: 99%

Heavy Majorana neutrino pair production from $Z^\prime$ at hadron and lepton colliders

Das,

Mandal,

Nomura

et al. 2022

Preprint

Self Cite

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A gauged U(1) extension of the Standard Model (SM) is a simple and anomaly free framework where three generations of Majorana type right-handed neutrinos (RHNs) are introduced to generate light neutrino mass and flavor mixings through the seesaw mechanism. We investigate such models at different hadron and lepton colliders via Z induced Majorana type RHNs pair production. We derive bounds on U(1) gauge coupling (g ) comparing the model cross sections with experimentally observed data for different Z mass (M Z ) and RHNs mass (MN ). Using these limits we estimate the allowed RHN pair production cross section which can be manifested by lepton number violating signatures in association with fat-jets at the hadron colliders depending on the mass of the RHNs. Hence we study dilepton and trilepton modes with fat-jet/s of the signal for different benchmark values of M Z and MN . Using fat-jet signatures and studying the signal and corresponding SM backgrounds, we estimate bounds on MN − M Z plane at different center of mass energies which could be probed at different hadron colliders. In the context of the lepton colliders we consider electron positron initial states where Majorana type RHNs can be produced from Z manifesting same sign dilepton plus jets signature and trilepton plus jets in association with missing energy. Studying the signal and corresponding SM backgrounds we estimate the bounds on the MN − M Z plane for different center of mass energies. In the context of U(1) extension of the SM there is an SM singlet BSM scalar which couples with the RHNs. We can probe the Majorana nature of RHNs via this BSM scalar production at electron positron colliders.

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Two-component scalar and fermionic dark matter candidates in a generic U$(1)_X$ model

Cited by 2 publications

References 61 publications

Radiative Plateau Inflation with Conformal Invariance: Dynamical Generation of Electroweak and Seesaw Scales

Radiative Plateau Inflation with Conformal Invariance: Dynamical Generation of Electroweak and Seesaw Scales

Heavy Majorana neutrino pair production from $Z^\prime$ at hadron and lepton colliders

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